Plasma cutter vs angle grinder vs oxy-acetylene for a home shop

@arc_annie · Sep 18, 2026 · 466 views
Difficultyeasy

For sheet and plate under 3/8": a 40 amp plasma cutter ($300 to $500, needs dry compressed air) is faster and cleaner than anything else and cuts aluminum and stainless. Grinder with cutoff wheels handles everything else for $0 extra and is what you use 80% of the time anyway. Oxy-acetylene cuts thicker steel, heats and bends, but the bottles and rent add up and you cannot cut aluminum.

If you already have a compressor, plasma is the upgrade that changes what you build. If you don't, buy more cutoff wheels.

#plasma-cutter#angle-grinder#oxy-acetylene#tools#welding

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@garage_gabe 1mo ago

Question: do you need to disconnect power for this or is it safe to leave it plugged in?

13
@arc_annie OP 1mo ago

Glad it helped.

1
@voltbike_val 1mo ago

Upvoted for the safety notes alone.

1
@arc_annie OP 1mo ago

Unplug it. Always. Takes two seconds and the worst case otherwise is a trip to the ER.

4
@rtr_watch 1mo ago

Tried this over the weekend and it worked first time. Thanks for writing it up properly.

1

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